Merge pull request #1 from XOOPS/master

Merge fork from main branch
Remove BOM
Convert UTF-8 encoding

Attempted to repair several mangled files as well. Also removed empty or redundant languages. There are issues with the 'german' and 'de_utf8' direcories, as there are substantial differences that still need to be resolved.
Conversion to UTF-8
Conversion to UTF-8
Merge pull request #112 from mambax7/master

added "go back"
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/geekwright/XoopsCore
Correct occurances of Unicode replacement character

In addition, do a quick update of the readme.txt files that were affected.
Merge pull request #113 from geekwright/master

Cleaning up encodings
Cleanup some issues in xoops_version.php files.
Fix date related format escaping
Add a codex page for XMF
Asset management, part 2
Merge pull request #115 from geekwright/master

Asset management, part 2
More asset cleanup

Rename smarty plugin to assets, rather than assetic.
Rename debugbar resources folder to assets.
Add copyFileAssets to Xoops\Core\Assets, used for fonts in debugbar
Add TinyMCE editor V4 with many others plugins
Merge pull request #116 from alain01/master

Add TinyMCE editor V4 with many others plugins
Merge Alain01's TinyMCE4